sweet potatoes and wire worms

just harvested my sweet potatoes, quite a reasonable quantity. i think i will plant them closer together next year, they seem to only produce tubers where the main plant was and not where the runners had rooted, probably not enough time in hot conditions.

any way my problem with the tubers that i have harvested is an infestation of wire worm, some of the tubers have been pretty much ruined by the little blighter's. annoying as this year i managed to get a decent crop after having poor results last year (first year growing them)

i was planning to mulch with either fresh or rotted rabbit manure, but i'm concerned this will give the wire worms something to feed on. should i mulch or just weed thoroughly and cover over winter.

i had wire worm problems in my first year (about 3 years ago) potato crop, they seem to have got less (almost completely gone) as i've kept on top of the weeding. i haven't got to lift my main crop yet (hoping to do it during the week) so can't say if they have been effected this year .

is there anything that i can do to try get rid of the little critters for next year

i do remember someone saying this before but i was a bit worried that it would encourage them to the area. in my potato patch i tried to starve them by removing grass and weeds that they feed on, this seemed to work out side.
 
i may try the potato idea over winter to see if i can get rid of them before next year.